Did i miscarry or is this normal??

I found out I was pregnant March 12 but have been experiencing light to dark brown discharge & last night I had sex with my husband and when I wiped there was dark red blood. OB says it's normal as long as there no large clots & intense abdominal pain. So today I've been having blood as if it's my period. The first 3 test were taken March 12&13 the last 2 at the bottom we're taken last than a hour ago with the very last one being the most recent. There was blood in my urine from the last 2 as you probably can tell. Would the blood interfere with a hpt? I go in tomorrow for hcg levels to be taken.. Praying this isn't another mc.....